FreeCalypso > hg > fc-magnetite
comparison doc/FCDEV3B-751774 @ 622:9f19cc5e46e8
FCDEV3B-751774 experiment documented
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Mon, 18 Nov 2019 05:03:15 +0000 |
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| 621:0d66718e5f33 | 622:9f19cc5e46e8 |
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| 1 We have one experimental FCDEV3B V2 board on which our regular Calypso chip | |
| 2 ([P]D751992AGHH) has been replaced with D751774AGHH, an earlier F-number | |
| 3 featuring DSP ROM version 3416 rather than the final version 3606 which we | |
| 4 normally work with. Both chip versions are Calypso C035 variants (ARM7 running | |
| 5 at 52 MHz, DSP running at 104 MHz), and both include AMR support - but there | |
| 6 must have been some issue with DSP version 34 (and maybe version 35 used in | |
| 7 Calypso+) that compelled TI to produce the newer and final version 36 which we | |
| 8 are most familiar with. | |
| 9 | |
| 10 Our Layer1 code is based on TI's TCS211-20070608 semi-src release (which we have | |
| 11 reconstructed back to full source), and it officially supports only DSP 36. | |
| 12 However, our FC Magnetite firmware can also be built for DSP 34 targets (see | |
| 13 the Calypso-version-override article), in which case we use a monolithic DSP | |
| 14 patch (no L1_DYN_DSP_DWNLD) extracted from the TSM30 source. The patch version | |
| 15 is 4130. | |
| 16 | |
| 17 The configure.sh target name for this special modified board is fcdev3b-dsp34 | |
| 18 instead of just fcdev3b, and the two firmware builds are not interchangeable: | |
| 19 the regular fcdev3b build goes into regular FCDEV3B boards, the special | |
| 20 fcdev3b-dsp34 build goes into the special FCDEV3B-751774 board. However, when | |
| 21 running its respective build this DSP 34 board appears to function just as well | |
| 22 as our regular DSP 36 targets: standalone RF tests work, DSP-based audio | |
| 23 services (beeps and Melody E1) work, connecting to a live GSM network worked, | |
| 24 a few test voice calls worked, all of them connected in AMR mode, voice passed | |
| 25 successfully in both directions. | |
| 26 | |
| 27 Going forward, we shall continue using D751992AGHH chips with DSP ROM version | |
| 28 3606 as our regular platform, but it is nice to know that the earlier DSP 34 | |
| 29 apparently works too. |